Complex-environment-resistant cogging-free torque excitation assembly and motor

Abstract

The utility model discloses a cogging-free torque excitation assembly resistant to a complex environment and a motor. The cogging-torque-free excitation assembly resistant to the complex environment comprises a stator shell, a plurality of coil frameworks, a plurality of coil windings and packaging rubber parts. The stator shell is arranged in a circular ring shape; the plurality of coil frameworks are arranged on the outer side of the circumference of the stator shell in a protruding mode and are distributed in a surrounding mode in the circumferential direction of the stator shell. The plurality of coil windings are wound on the plurality of coil frameworks; and the packaging glue piece is cured and formed and wraps the outer side of the circumference of the stator shell so as to package the coil winding. After the coil winding is mounted on the coil framework, the coil winding is packaged and fixed by the packaging rubber piece, so that the problem of a cogging effect is solved, the structure is lighter, more compact and simpler in arrangement and higher in precision, the coil winding can be better protected by adopting the packaging rubber piece for packaging, and a corrosion-resistant effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a non-cogging torque excitation component and a motor resistant to complex environments. Background Art

[0002] Traditional motors are usually composed of a casing, stator, rotor, windings, bearings, etc. The stator is a multi-layer silicon steel sheet with teeth stacked in the casing, and the windings are embedded in the stator slots. Therefore, during the operation of the motor rotor magnetic poles, a jumping torque is generated with the stator, namely the tooth effect, which seriously affects the starting and smooth operation of the motor.

[0003] Therefore, the prior art has improved some slotless brushless motors; although the slotless brushless motors have solved the slot effect, the internal slotless excitation assembly of the existing slotless brushless motors, as an important component for providing excitation current to form a stable magnetic field, still has the problems of complex structure and low precision, and is easily corroded in some corrosive environments, resulting in a short service life. Utility Model Content

[0004] The utility model aims to provide a cogging-free torque excitation component and a motor resistant to complex environments, aiming to solve the problems of the existing cogging-free excitation component having a complex structure, low precision and easy corrosion resulting in a short service life.

[0005] In order to solve the above technical problems, the purpose of the utility model is achieved through the following technical solutions: to provide a non-cogging torque excitation component resistant to complex environments, comprising:

[0006] The stator housing is arranged in a circular ring shape;

[0007] A plurality of coil frames are convexly disposed on the outer circumference of the stator shell and are distributed around the circumference of the stator shell;

[0008] A plurality of coil windings are wound on a plurality of the coil frames;

[0009] The packaging plastic part is solidified and formed and is arranged to cover the outer circumference of the stator shell to package the coil winding.

[0010] Furthermore, the complex environment resistant non-cogging torque excitation component also includes:

[0011] A limiting member surrounds the plurality of coil frames along the circumferential outer side of the stator shell to limit the coil windings on the coil frames.

[0012] Furthermore, a limiting recess is provided on the outer side of the coil skeleton, and a plurality of limiting recesses on the coil skeleton form an annular limiting ring; the limiting member surrounds the annular limiting ring.

[0013] Furthermore, two limiting recesses are provided on the coil frame, and the two limiting recesses are respectively close to two ends of the coil frame.

[0014] Furthermore, the complex environment resistant non-cogging torque excitation assembly further includes:

[0015] A limiting tape is wrapped around the stator shell along the outer circumference of the stator shell to limit the coil winding at at least one end of the coil frame.

[0016] Furthermore, the complex environment resistant non-cogging torque excitation component also includes:

[0017] An annular bracket, one end of which is provided with an annular positioning groove;

[0018] One end of the stator shell is provided with an outer convex edge and is positioned and installed in the annular positioning groove through the outer convex edge.

[0019] Furthermore, corresponding mounting holes are provided between the stator housing and the annular bracket, and the fixed parts are inserted into the corresponding mounting holes for fixed connection.

[0020] Furthermore, the annular bracket is coated with a high temperature resistant protective layer.

[0021] Furthermore, a lead-in hole is provided on the outer convex edge; and an opening corresponding to the lead-in hole is opened on the annular bracket.

[0022] An embodiment of the utility model further provides a motor, which comprises the complex environment resistant non-cogging torque excitation component as described above.

[0023] The embodiment of the utility model provides a non-cogging torque excitation component and a motor that can withstand complex environments. The non-cogging torque excitation component that can withstand complex environments includes: a stator shell, multiple coil frames, multiple coil windings, and a packaging rubber part; the stator shell is arranged in a circular ring shape; multiple coil frames are convexly arranged on the outer side of the circumference of the stator shell, and are distributed around the circumferential direction of the stator shell; multiple coil windings are wound on multiple coil frames; the packaging rubber part is solidified and formed and coated on the outer side of the circumference of the stator shell to encapsulate the coil windings. After the coil windings of the embodiment of the utility model are installed on the coil frame, they are packaged and fixed by the packaging rubber part, thereby solving the problem of the cogging effect, and the arrangement of this structure is lighter, more compact, simpler, and more precise. The packaging method using the packaging rubber part can also better protect the coil windings and has a corrosion-resistant effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A schematic diagram of the three-dimensional structure of an excitation assembly provided in an embodiment of the utility model;

[0026] Figure 2 A schematic diagram of an exploded structure from a first perspective of an excitation assembly provided in an embodiment of the utility model;

[0027] Figure 3 A schematic diagram of an exploded structure from a second perspective of an excitation assembly provided in an embodiment of the utility model;

[0028] Figure 4 for Figure 3 A schematic diagram of the enlarged structure of the local A in the middle;

[0029] Figure 5 A schematic flow chart of a method for manufacturing an excitation assembly provided in an embodiment of the utility model.

[0030] Description of the symbols in the figure:

[0031] 1. stator housing; 11. outer convex edge; 12. lead hole;

[0032] 2. Coil skeleton; 21. Limiting notch;

[0033] 3. Packaging plastic parts;

[0034] 4. annular bracket; 41. annular positioning groove; 42. opening. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0037] It should also be understood that the terms used in this utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in this utility model specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0038] It should be further understood that the term “and / or” used in the present specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0039] Combination Figure 1-3 The embodiment of the utility model provides a non-cogging torque excitation assembly resistant to complex environments, comprising: a stator housing 1, a plurality of coil skeletons 2, a plurality of coil windings and a packaging plastic part 3;

[0040] The stator shell 1 is arranged in a circular ring shape; a plurality of coil frames 2 are protrudingly arranged on the outer circumference of the stator shell 1 and are distributed around the circumferential direction of the stator shell 1; a plurality of coil windings are wound on the plurality of coil frames 2; a packaging plastic part 3 is solidified and formed and is coated on the outer circumference of the stator shell 1 to encapsulate the coil windings.

[0041] In this embodiment, the stator shell 1 is used as an installation carrier and can be made of a strong, high-quality and lightweight plastic part. Multiple coil skeletons 2 are arranged around the outer side of the circumference of the stator shell 1 and are evenly distributed around the circumference at equal intervals. The coil skeletons 2 can be integrally injection molded with the stator shell 1, or fixedly bonded to the stator shell 1. The number of coil skeletons 2 can be set according to actual needs, and this embodiment does not make any specific limitations.

[0042] In this embodiment, the coil frame 2 adopts a convex strip structure and does not have a tooth slot design. After the coil winding is wound on the coil frame 2, it is encapsulated and fixed by the encapsulation rubber part 3, thereby solving the problem of the tooth slot effect. The encapsulation rubber part 3 is encapsulated on the outer side of the circumference of the stator shell 1 with encapsulation rubber and then solidified. Therefore, the coil frame 2 and the coil winding can be completely covered, thereby achieving encapsulation and fixation.

[0043] Based on the structural design of this embodiment, the structure is arranged lighter, more compact, simpler and more precise. The packaging method using the packaging rubber part 3 also reduces the difficulty of shaping the coil winding, better protects the coil winding, and has a corrosion-resistant effect.

[0044] In one embodiment, the complex environment resistant non-cogging torque excitation assembly further includes: a limiter, which surrounds the plurality of coil skeletons 2 along the circumferential outer side of the stator shell 1 to limit the coil windings on the coil skeleton 2.

[0045] In the present embodiment, when potting with potting glue, it is necessary to avoid the situation of wire jumpers and floating in the coil winding. Therefore, after the potting glue is potted and formed into the packaging glue part 3, the surface of the packaging glue part 3 needs to be fine-processed to remove excess glue. If the coil winding has wire jumpers and floating, it may cause wire breakage during fine processing; therefore, it is necessary to ensure that the coil winding can remain stable before potting with potting glue; based on this, a limit member is provided, and the limit member is wrapped around the multiple coil skeletons 2 along the circumferential outer side of the stator shell 1, so as to press the coil winding to prevent the situation of wire jumpers and floating.

[0046] In this embodiment, the limiter can be made of high temperature and corrosion resistant fiber rope, such as Kevlar fiber rope; the fiber rope is wrapped around multiple coil frames 2 for multiple turns to produce a binding effect, thereby compacting the coil winding.

[0047] Further, combined with Figure 4 In order to facilitate the limiting member to stably compress the coil winding, a limiting recess 21 is opened on the outer side of the coil frame 2, and the limiting recesses 21 on the multiple coil frames 2 form an annular limiting ring; the limiting member is surrounded by the annular limiting ring; in this way, the limiting member can be stably tied in the annular limiting ring to ensure stable compression of the coil winding.

[0048] Furthermore, in order to ensure that the limiting member can better and more comprehensively compress the coil winding, two limiting recesses 21 are provided on each coil frame 2, and the two limiting recesses 21 are respectively close to the two ends of the coil frame 2, thereby forming two annular limiting rings; in this way, by respectively binding the two limiting members in the two annular limiting rings, the effect of compressing the coil winding can be further improved.

[0049] Furthermore, because the limiting member is wrapped and tied with a fiber rope, which is relatively thin, the coil winding is still prone to overall jumps during tying. Therefore, a limiting tape can be provided. Before tying with the limiting member, the limiting tape is first used to wrap around the stator shell 1 along the outer circumference of the stator shell 1 to compress and limit the coil winding at at least one end of the coil skeleton 2; and then the limiting member is used to wrap around and tie the coil winding at the other end of the coil skeleton 2; in this way, the coil windings outside the two ends of the coil skeleton 2 (that is, the two ends of the coil winding) have been compressed; that is, the coil skeleton 2 will not jump as a whole, and then two limiting members are used to tie at two annular limiting rings respectively; thereby ensuring that the coil winding will not jump or float during subsequent potting with potting glue.

[0050] In one embodiment, the complex environment resistant slotless torque excitation assembly also includes an annular bracket 4, one end of which is provided with an annular positioning groove 41; one end of the stator shell 1 is provided with an outer convex edge 11 and is positioned and installed in the annular positioning groove 41 through the outer convex edge 11.

[0051] In this embodiment, the annular bracket 4 can be made of an aluminum alloy bracket, which can ensure the structural stability of the stator shell 1, thereby ensuring the structural stability of the entire excitation assembly; specifically, an annular positioning groove 41 is provided on one end of the annular bracket 4 (that is, the end face connected to the stator shell 1), and the shape of the outer convex edge 11 at one end of the stator shell 1 is adapted to the shape of the annular positioning groove 41. The stator shell 1 is positioned and installed in the annular positioning groove 41 through the outer convex edge 11, thereby ensuring the accuracy of subsequent connection.

[0052] Specifically, corresponding mounting holes are provided between the stator case 1 and the annular bracket 4, and the fixing parts are inserted into the corresponding mounting holes for fixed connection; wherein, the mounting holes on the stator case 1 can be threaded holes, and the fixing parts can be screws threadedly fixed in the threaded holes, so as to achieve stable fixation. More specifically, multiple groups of mounting holes can be provided between the stator case 1 and the annular bracket 4 and distributed in the circumferential direction; that is, the connection stability between the stator case 1 and the annular bracket 4 can be ensured by fixed connection at multiple positions.

[0053] In this embodiment, the annular bracket 4 may be covered with a high temperature resistant protective layer; preferably, the protective layer may be made of 3M tape, and the 3M tape at least covers all exposed surfaces of the annular bracket 4, thereby ensuring the high temperature resistance of the annular bracket 4.

[0054] In one embodiment, a lead-in hole 12 is formed on the outer convex edge 11 ; and an opening 42 corresponding to the lead-in hole 12 is formed on the annular bracket 4 .

[0055] In this embodiment, the end of the coil winding passes through the lead hole 12 and is led out through the opening 42 on the annular bracket 4 to facilitate external connection with other components; it should be understood that the coil winding is usually made up of multiple coils, so multiple lead holes 12 can be set and correspond to the number of coils, and each lead hole 12 is used to lead out one coil; it has the effect of regular wiring and uniform arrangement.

[0056] An embodiment of the utility model further provides a motor, which comprises the above-mentioned cogging-free torque excitation component that can withstand complex environments.

[0057] Based on the above-mentioned complex environment resistant non-cogging torque excitation components; Figure 5 As shown, the following is a detailed description of the production method:

[0058] S1, preparing an integrally formed stator housing 1 and a plurality of coil skeletons 2 by injection molding in advance;

[0059] S2, winding the coil on multiple coil skeletons 2 according to the preset number of turns to form multiple coil windings;

[0060] S3, wrapping the binding wire around the plurality of coil skeletons 2 along the circumferential outer side of the stator shell 1 to form a limiting member for limiting the coil winding on the coil skeleton 2;

[0061] S4, installing one end of the stator housing 1 on the prefabricated annular bracket 4;

[0062] S5, using potting glue to pot the outer circumference of the stator shell 1, and solidifying to form a packaging glue part 3 covering the outer circumference of the stator shell 1 to encapsulate the coil winding.

[0063] In this embodiment, first, the stator shell 1 and multiple coil frames 2 can be integrally formed by injection molding equipment; then multiple coils are prepared, the coils are installed on a winding machine and locked, and the ends of the coils are attached to the circumferential outer side of the stator shell 1. Then, the winding machine can be used to wind the multiple coils on the coil frame 2 according to the number of turns required; thereby, multiple coil windings wound on multiple coil frames 2 are formed; and then a scraper is used to shape the coil windings.

[0064] Then, the plurality of coil windings are initially surrounded and limited by limiting tape to ensure that the coil windings will not jump out of the coil frame 2 as a whole, and then a plurality of limiting members are used to surround and tie the coil frame 2 to compress the coil windings.

[0065] Then, one end of the stator housing 1 is mounted on the prefabricated annular bracket 4 and fixedly connected by screws to ensure the stability of the overall structure.

[0066] Finally, the mold is used to seal the potting glue on the circumferential outer side of the stator shell 1, and it is naturally cured for 6 hours, and then cured by baking in an oven (the oven temperature is 80°C and the baking time is 1 hour), thereby forming a packaging glue part 3 covering the circumferential outer side of the stator shell 1. The packaging glue part 3 is then inspected and the excess glue is cleaned to complete the process.

[0067] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A non-cogging torque excitation component resistant to complex environments, characterized in that: include: The stator housing is arranged in a circular ring shape; A plurality of coil frames are convexly disposed on the outer circumference of the stator shell and are distributed around the circumference of the stator shell; A plurality of coil windings are wound on a plurality of the coil frames; The packaging plastic part is solidified and formed and is arranged to cover the outer circumference of the stator shell to package the coil winding.

2. The complex environment resistant non-cogging torque excitation assembly according to claim 1, characterized in that: Also includes: A limiting member surrounds the plurality of coil frames along the circumferential outer side of the stator shell to limit the coil windings on the coil frames.

3. The complex environment resistant non-cogging torque excitation assembly according to claim 2 is characterized in that: A limiting notch is provided on the outer side of the coil frame, and a plurality of limiting notches on the coil frame form an annular limiting ring; the limiting member surrounds the annular limiting ring.

4. The complex environment resistant non-cogging torque excitation assembly according to claim 3 is characterized in that: There are two limiting notches on each coil frame, and the two limiting notches are respectively close to two ends of the coil frame.

5. The complex environment resistant non-cogging torque excitation assembly according to claim 3, characterized in that: Also includes: A limiting tape is wrapped around the stator shell along the outer circumference of the stator shell to limit the coil winding at at least one end of the coil frame.

6. The complex environment resistant non-cogging torque excitation assembly according to claim 1, characterized in that: Also includes: An annular bracket, one end of which is provided with an annular positioning groove; One end of the stator shell is provided with an outer convex edge and is positioned and installed in the annular positioning groove through the outer convex edge.

7. The complex environment resistant non-cogging torque excitation assembly according to claim 6, characterized in that: Corresponding mounting holes are arranged between the stator shell and the annular bracket, and the stator shell and the annular bracket are fixedly connected by inserting the arranged fixing pieces into the corresponding mounting holes.

8. The complex environment resistant non-cogging torque excitation assembly according to claim 6, characterized in that: The annular support is coated with a high temperature resistant protective layer.

9. The complex environment resistant non-cogging torque excitation assembly according to claim 6, characterized in that: A lead-in hole is provided on the outer convex edge; and an opening corresponding to the lead-in hole is opened on the annular bracket.

10. A motor, characterized in that: It comprises the complex environment resistant non-cogging torque excitation component as claimed in any one of claims 1 to 9.

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